Crank connection for engines.



lxhwtneooco R. S. MOORE & J. L. SIMMONS. CRANK CONNECTION FOR ENGINES.

. APPLICATION FILED MAR. 30, NHL 1,1 34,545., Patented Apr. 6, 1915. v

R. S. MOORE & J. L. SIMMONS.

CRANK CONNECTION .FOR ENGINES.

APPLICATION FILED MAR.30,'|911. Patented Apr. 6, 1915.

: 3 SHEETS-SHEET 2.

J n uemtoz; a @s, m

H v affouwqj mam R. S. MOORE & J. L. SIMMONS.

CRANK CONNECTION FOR ENGINES.

APPLICATION FILED MAR.30, I911.

1,1 34,545. Patented pr. 6, 1915.

3 SHEETSSHEBT3 INVENTORS nonnn'rs. MOORE am) ruins LEE smmons, ofwn'snmtgron, ms'rnro'rorf eo AssIeNons r erno moron couramz, or wnsnnre'roiv, premieres-co a corneas-non arm msrnrcr or conumnm.

0mm]: connncrron roa niro Specification of lflrtent.

Application filed March 30, 1911. Serial 617,854.

To all whom it may concern a modified form of means for attaching the Be it known that we, Ronnirr' S. Moons and Janos LEE SIMMONS, citizens of the.

United States, residing at Washington, in the District of Columbia, have invented certain new and'useful Improvements in Crank Connections for Engines, of which the following is a description, reference-being had to the accompanying drawing and to the letters and figures of reference marked thereon.

The invention relates to new-and useful improvements in the crank connection between the piston rod, and the crank shaft of the gas engine, and more especially to a gas engine having a plurality of cylim.

ders and a plurality of piston rods al of which are connected'to the same crank shaft.

An object of the invention is to provide a connection for the piston rod which shall be durable in construction, comparatively free of friction and readily assembled on the crank shaft.

In the drawings which show b way of illustration'one embodiment of t e" invention, Figure 1 is a side view with parts in section, showing the connection between the piston rod and the crank shaft. Fig. 2 is a orizontal. sectionalview, showing in part a plurality of cylinders and piston rods. Fig. 3 is a view similar to Fig. 1, showing piston rods to the crank shaft. Fig. 4 is a sectional view throu h the crank connection. Fi -5 is a detail 0 the supporting collar; and Fig. 6 is a detail of the retaining pin.

In the drawings .we have shown the invention as applied to a seven cylinder gas engine wherein the cylinders 1 are connected to a casing 2 which'is mounted to rotate on a shaft 3 which is held stationary. The shaft 3 carries a crank arm 4. .A second crank arm 5 is connected to the shaft 6 which is in line with the shaft 3, and on which also is'journaled the casing 2. The crank arm 4, carries a crank shaft 7, which may be rigidly secured thereto in any desired way. The other end of the crank shaft 7 is fits the crank shaft 7 and said crank arm is secured to the crankshaft by a locking pin 8. In'each cylinder is a piston 9, to which is pivotally connected a piston rod 10. The

piston rod 10 is provided adjacent the crank shaft with laterally projecting shoulders 11 and with centrally projecting portion 12 which is formed with an opening adapted toreceive a sleeve 13, carried by-the crank shaft 7. A pair of collars 14 are mounted PatentedAprrdii ifi" on the crank shaft 7, or the inwardly projecting sleeves carried by the crank arms,

andsaidv collars are each provided with a 4' race-way'for anti-friction balls '15. A pair of collars 16 surround the crank shaft, and

. are eachprovided with a race-way corre- 'spondmg to the race-way in the collars 14' and adapted to receive the anti-friction balls to thecollars 16,'and will-be taken up by the anti-fr ction balls 15 resting against the- I collars 14 on the crank shaft.

The openin" in the central member 12 of the piston ro ,is made sufficiently large sothat the thrust of the piston is tak n up entirely by the anti-fricti0n balls. The

object of this central portion of the piston rod ismerely to keep the piston rod properly centered relative to the crank shaft and insure the thrust being directly in line there'. with. Mounted on each. of the collarsl6' is a second collar 19 which is formed with flanges on the collars 16, so that the collars f Y 19 are held in engagement with the shoulders on the piston rod. Any downward thrust on the piston rod due to centrifugal force in the rotation of .the cylinders, will be taken up by these collars 19 and received by the anti-friction balls which support the collar 16. The'inwardly projecting portions 12 on the various piston rods are so disposed as to nest side by side between the collars 16 as clearly shown in Fig. 1.

In assembling the parts, one of the crank arms is attached to the crank shaft if not made integral therewith. The collar 14 and the collars 16 and 19 are assembled and placed on the crank shaft at one side thereof ceive the crank shaft.

against the crank arm. The piston rods are then put in place on the sleeve 13 on the crank shaft. Then the other set of collars and anti-friction balls are laced on the crank shaft and finally the ot er crank arm secured to the crank shaft by the locking pin 8. It will thus be seen that the entire parts for connectingjhe piston rod to the crank shaft are held in place by the crank arms. The entire inner and outer thrust on the piston rod is taken up by the antiprojecting shou friction balls through the collar connections with the crank shaft. The iston rod is merely kept in proper line w1th the crank shaft by the direct connection through the piston rod and crank shaft.

In Figs. 3, 4, 5,'and 6 is shown a slightly modified form of the invention. The piston rod 10 isformed integral with a central member 20 which is cut away so as to form seats 21 for the connections of the other.

piston rods. The central member 20 is attached to a collar 22 and each of the piston rods except the one which is integrally attached to the central member. are held in their seats on the central member by pivot pins 23. The collar 22 is formed wlth outwardly projecting lugs 24 which receive the pivot pins 23. The collar 22 in a measure takes the place of thelaterally projecting shoulders on the piston rods 10 in the form of the invention shown in Figs. 1 and 2. Located within each collar 22 is a pair of collars 25 and 26 between which are placed anti-friction balls 27 which run in raceways in said collars. In assembling these parts, the same method is followed as described in connection with Figs. 1 and 2, and the parts are all held in place by the crank arms throu h their connection with the crank shaft. t will be noted that the entire thrust on the piston rods will be taken departing from the spirit of the invention as set forth inthe appended claims.

Having thus particularly described our invention, what we claim asnew and desire to secure by Letters Patent, is:-

' 1. An engine including in combination, a crank shaft, a piston rod having laterally ders, a. air of collars surrounding the crank sha t and engaging respectively the inner faces of said shoulders, friction balls between the collars and the crank shaft, a second pair of collars surrounding said crank shaft and engaging respectively the outer face of said shoulder, said piston rod having an inwardly nroiecting member provided with anopening to re- 2. An engine including in combination a crank shaft, a plurality of piston rods each of which is provided with laterally projecting shoulders, a pair of collars surrounding the crank shaft and engagingrespectively the inner face of each of said shoulders on one side of the piston rod, friction balls between the collars-and the crank bhaft, a secsecond pair of collars mounted on the crank shaft and located within said first named collars, anti-friction balls between said collars, on the crank shaft, and said first named collars, a third pair of collars carried by the first named collars and engaging theouter face of said shoulders, each of" said piston rods having an inwardly projecting part provided with an opening to receive the crank shaft, said inwardly projecting parts on the pistons being dispased side by side on the crank shaft.

t. An engine including in combination, a plurality of iston rods each; having laterally projectingshoulders, a pair oi collars surrounding the crank shaft and engaging the inner faces of said shoulders, a. second pair of collars mounted on the crank shaft and located within said firstnamed collars, anti-friction balls between said colcrank shaft, oneof said'crank arrns sing detachably connected with the crank shaft, whereby said collars ma be assembled on the crank shaft and he d thereon by the crank shaft.

lln testimony whereof we athxonif sig natures, in presence of two witnes a,

'- ROBERT S. l/lOtllFt JAMES LEE STETMUNE. Witnesses: Y A. M. PARKINQ,

Aannnr POJPKINE.

till

llt 

